Natural medicine for treatment of diabetes

I am looking for information on the treatment of diabetes on behalf of my neighbour.

I know cinnamon is helpful, but I’m not sure if this is the same cinnamon sold in shops, or does he need special cinnamon supplements?

Cinnamon has been shown in scientific testing to help with the regulation of insulin signals in people with non-insulin dependent Type II diabetes. The cinnamon used is indeed the same as the one used in most kitchens, however, it is worth noting that cassia (cinnamomum cassia) is thought to be even more effective than standard cinnamon (cinnamomum verum). Cloves have also been shown to reduce the insulin-sensitising effects in abdominal fat cells and liver cells.